Potomac River Treatment Near Harpers Ferry to Control Black Flies
Maryland to treat Potomac River to fight black flies near Harpers Ferry
Herald-Mail Media | Monday, August 11, 2025
The Maryland Department of Agriculture plans to treat a section of the Potomac River near Harpers Ferry to control black fly populations. Scheduled for August 11, the intervention involves applying a Bti-based larvicide via helicopter. This treatment is part of a pilot program initiated in 2016 to alleviate black fly nuisance in the area, which includes local landmarks and communities such as Charles Town and Ranson. While the treatment may temporarily discolor the water, it poses no harm to humans or aquatic life, ensuring the safe enjoyment of outdoor activities in the region. For further details, residents can visit the Maryland Department of Agriculture's website. Published by Herald-Mail Media, this announcement highlights ongoing environmental management efforts in the area.
